Riveting-sleeve



E. L. DOERR.

RIVETING SLEEVE.

APPLICATION men JULY 11, I919. v

. 1 13363 576 Patented Dec. 28,1920.

ZZ'DOEZR' OFFICE.

RIVETING-SLEEVE.

Application filed July 11, 1919.

To all whom it may concern Be it known that I, FRANK Lao Donna, a citizen 0]": the United States, residing at Topeka, in the county of Shawnee, State of Kansas, have invented a new and useful Riveting-Sleeve; and I do hereby declare the following-to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to riveting sleeves and has for its object to provide a sleeve which may be easily and quickly applied to casings of stay bolts, on which is held a dolly bar, for the purpose of riveting the stay bolts, and to provide a reciprocating riveting plunger within said riveting sleeve, which plunger may be reciprocated by a riveting hammer of the pneumatic type.

A further object is to provide the plunger with a circumferential flange, which flange is adapted to engage limiting means carried by the interior chamber of the riveting sleeve, thereby eliminating the use or" set screws or pins, which break off, said breakin being caused by the jar of the hammers.

with the above and other objects in view, the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a side elevation of the riveting sleeve, part being broken away to show the reciprocating plunger within the same.

Fig. 2 is a side elevation of the riveting sleeve for showing another form of cap, which is adapted to screw onto a stay bolt casing.

Referring to the drawings, the numeral 1 designates a cylindrical hollow body member having a chamber 2 therein. One end of said cylindrical body is provided with a circumferential flange 3 around the marginal edge of the chamber 2, said flange forming a limiting abutment for the riveting plunger 4:, which plunger is adapted to reciprocate within the chamber 2. A circumferential flange 5 is integrally formed on the plunger 4 and is adapted to contact with the flange 3 and be limited in its reciprocation in one direction.

Specification of Letters Patent.

Patented Dec. 28, 1920.

Serial No. 310,226.

The end 6 of the sleeve 1 is provided with internal threads 7, which threads are adapted to receive the threaded portion 8 of the cap 9 which cap is adapted to thread into a stay bolt sleeve 8 by means of the threads 10. Stay bolt sleeves vary, some are internally threaded as shown in Fig. 1 and some are externally threaded as shown in Fig. 2, therefore a cap 9 is shown in Fig. 2, which would thread over a stay bolt sleeve 8, which stay bolt sleeve would be received by the threads 11 thereof. The stay bolt sleeves 8" are exteriorly threaded as at 8. into the wall 8 of the boiler. The stay bolts 8 have their ends extending through the sleeves 8 and are provided with spherical enlargements 8. When it is desired to rerivet the spherical head of the stay bolt, the riveting sleeve is screwed onto the stay bolt sleeve 8 and then a dolly bar S is placed against the plunger 4 as shown in Figs. 1 and 2, however when the dolly bar is against the plunger 4, a riveting action is taking place at the other end of the stay bolt. It is to be understood, however, that a pneumatic hammer may be placed directly in contact with the end of the plunger 4 for riveting the stay bolts instead of the use of a dolly bar on the opposite end of the stay bolt. The threaded portion 8 when threaded into the end 6 of the sleeve 1 forms a shoulder 12, with which shoulder 12 the flange 5 is adapted to engage thereby limiting the forwardmovement of the plunger 4 in its forward reciprocation. Cap plates 9 and 9* are provided with longitudinal chambers 13 of substantially the same diameter as the portion 14 of the plunger, said portion 14 having a riveting socket 15 in the end thereof, which riveting socket is adapted to en gage the head of the stay bolt and rivet the same, there being. a dolly bar against a plunger of another riveting sleeve at the other end of the stay bolt. The riveting action is caused by the reciprocation of the plunger 4 which is actuated by the conventional form of pneumatic hammer. During the reciprocation of the plunger the flange 5 will be limited at both ends of the plunger stroke by contact with the flange 3 and the shoulder 12.

Caps 9 and 9 are provided with circumferential flanges 15 which flanges are adapted to jam against the end of the sleeve 2, however, said flanges are provided with flattened portions 16 so that a wrench may be placed on the same and the cap removed when desired.

The invention having been set forth what is claimed as new and useful is 1. A riveting sleeve comprising a cylindrical body member, said body member having a cylindrical chamber therein, one end of said chamber being provided with a circumferential flange forming a shoulder, and a threaded cap threaded into the other end of the cylindrical chamber and having a cylindrical bore therein, a reciprocating plunger slidably mounted in the chamber of the cylindrical sleeve and having means adapted to contact with the shoulder formed by the flange at one end of the cylindrical chamber and the shoulder formed by the cap at the other end of said cylindrical sleeve.

2. A riveting sleeve comprising a cylindrical body member said body memberhaving a cylindrical chamber therein, one end of said chamber being provided with a circumferential flange forming a shoulder, a stay bolt engaging cap threaded into the other endof said cylindrical chamber, said cap being provided with a central bore, a

plunger disposed in the cylindrical chamber of the body member and having one end thereof disposed in the bore of the cap, said plunger being provided with a circumferential flange, said flange being adapted to engage the shoulder formed by the chamber flange and the shoulder formed by the cap thereby limiting the stroke of the plunger durin its reciprocation.

3. X riveting sleeve comprising a body member having a cylindrical chamber therein, a reciprocating riveting plunger slidably mounted within said chamber, limiting means at the ends of said chamber and a circu-mferential flange carried by said riveting plunger and adapted to engage said limiting means at the ends of said chamber thereby limiting the stroke of the plunger during its reciprocation.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK LEO DOER-R.

Witnesses:

HARVEY D. PALMER, G. H. FALTY. 

